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arXiv · 2107.00604

Three loop calculations and inclusive $V_{cb}$

Marzia Bordone·Bernat Capdevila·Paolo Gambino
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Abstract

We discuss the impact of the recent $\mathcal{O}(\alpha_s^3)$ calculations of the semileptonic width of the $b$ quark and of the relation between pole and kinetic heavy quark masses by Fael et al. on the inclusive determination of $|V_{cb}|$. The most notable effect is a reduction of the uncertainty. Our final result is $|V_{cb}|=42.16(51)\, 10^{-3}$.

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Marzia Bordone, Bernat Capdevila, Paolo Gambino. 2021-07-01. Three loop calculations and inclusive $V_{cb}$. https://doi.org/10.1016/j.physletb.2021.136679

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